What is the standard deviation of the exponential distribution whose density function is f(x)=10*e^(-10x)?

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i